Colour correction and Pass values at given time
I've got an unusual situation that I'm battling to resolve. Basically due to not having DLP projectors we are see the overlap of our projectors even after blending. The solution, other than painting the screen darker (which ruins colours so can't do) or swapping projectors (can't do as no money) is colour grading the footage.
I've been spouting in from After Effects and keyframing the opacity of light grey shapes that match the darker areas. It's fiddly but works. However when I export and add as a video layer using additive, it doesn't fully translate to what I was seeing via spout. Probably to due with codec.
Plan B is to see if I can do it all in Isadora. I'm thinking I alter intensity of three projectors that match the darker areas. What would be the easiest way of doing this? I want to say at timecode 00:05:00 set intensity to 25% etc...then 00:09:00 set intensity to 20%.
Is there a way to do a inside range with multiple values? Like an array. Or am I best in doing it with an envelope generator.
Any suggestions would be appreciated.
Fred last edited by
@dariuspowell I could imagine using inside range to trigger steps in the envelope generator might be the bet, this way you lerp between values (due to the envelope generator) but can trigger each segment on time.
bonemap last edited by bonemap
You could simply use 'timecode' with your movie player and 'Timecode Comparator' actor. I have prototyped an Isadora patch that records timecode points through a keypress. The idea being that you can play a media file through once and record timecode points as it plays, by pressing a key. The timecode points are then stored in an array that can then be accessed repeatedly to compare using the 'timecode comparator' as the media track plays through again. Following is a screen shot of the patch. If you are interested in having a look at the patch let me know:
@bonemap Thanks that's the kind of array setup I was thinkin of using.
In the end I used Spout via After Effects to send video to the screen and I was then able to keyframe the colour correction before exporting. Not 100% perfect but better than before.